TWI545488B - Capacitive touch panel - Google Patents
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- TWI545488B TWI545488B TW103129896A TW103129896A TWI545488B TW I545488 B TWI545488 B TW I545488B TW 103129896 A TW103129896 A TW 103129896A TW 103129896 A TW103129896 A TW 103129896A TW I545488 B TWI545488 B TW I545488B
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Description
本發明是有關於一種觸控技術,且特別是有關於一種電容式觸控面板。 The present invention relates to a touch technology, and in particular to a capacitive touch panel.
手機、車用導航系統、可攜式電腦、電腦等具有觸控輸入功能的電子設備已被廣泛使用,而這些產品通常配有觸控面板。目前所常採用之觸控原理概可分為電阻式、電容式、紅外線感應式、電磁感應式、音波感應式等不同的技術原理。舉例來說,電容式觸控面板可具有透明的觸控陣列,觸控陣列可由複數個第一軸向電極以及複數個第二軸向電極所組成,而第一軸向電極可由位於與第二軸向電極同向排列的第一軸向導線引出。 Electronic devices with touch input functions, such as mobile phones, car navigation systems, portable computers, and computers, have been widely used, and these products are usually equipped with a touch panel. At present, the touch principle commonly used can be divided into different technical principles such as resistance type, capacitance type, infrared induction type, electromagnetic induction type, and sound wave induction type. For example, the capacitive touch panel may have a transparent touch array, and the touch array may be composed of a plurality of first axial electrodes and a plurality of second axial electrodes, and the first axial electrodes may be located at the second and second The axial electrodes are led out in the same direction as the first axial wires.
一般而言,當第一軸向導線的配置位置與觸控陣列的配置位置距離較近時,第一軸向導線與相鄰的第二軸向電極之間容易發生串擾。在現有的電容式觸控面板的設計中,可透過在第一軸向電極與第一軸向導線之間設置地線,以屏蔽兩軸訊號。但實際中,地線的電性屏蔽效果并不佳,還容易與第一軸向導線電性導通發生短路。此外,第一軸向導線與地線之間用絕緣層絕緣,地線要跨越絕緣層的高度因而容易產生斷裂現象。 In general, when the arrangement position of the first axial wires is close to the arrangement position of the touch array, crosstalk is likely to occur between the first axial wires and the adjacent second axial electrodes. In the design of the existing capacitive touch panel, a ground line is disposed between the first axial electrode and the first axial wire to shield the two-axis signal. However, in practice, the electrical shielding effect of the ground wire is not good, and it is easy to short-circuit with the electrical conduction of the first axial wire. In addition, the first axial wire and the ground wire are insulated by an insulating layer, and the ground wire is required to cross the height of the insulating layer to be easily broken.
本發明實施例提供一種電容式觸控面板,包括一基板、一觸控陣列、一第一軸向導線以及至少一個邊緣虛設電極。觸控陣列設置於基板上,且觸控陣列包括複數個第一軸向電極以及複數個第二軸向電極,所述複數個第一軸向電極與所述複數個第二軸向電極係交錯設置且彼此電性絕緣。所述各個第一軸向電極可包括 複數個彼此連接的第一軸向電極片,所述各個第二軸向電極可包括複數個彼此連接的第二軸向電極片,第一軸向電極片以及第二軸向電極片呈矩陣排列。所述第一軸向導線設置於基板上,且第一軸向導線電性連接於各個第一軸向電極,並與第二軸向電極同向排列。第一軸向電極中與第一軸向導線直接相連的第一軸向電極片定義為邊緣第一軸向電極片,第二軸向電極中與第一軸向導線直接相鄰且同向排列的第二軸向電極片定義為邊緣第二軸向電極片。所述邊緣虛設電極具有本體部以及與本體部連接的屏蔽部,本體部設置於邊緣第一軸向電極片與邊緣第二軸向電極片之間。屏蔽部設置於第一軸向導線與邊緣第二軸向電極片之間,並與第一軸向導線同向排列,使第一軸向導線與邊緣第二軸向電極片之間透過邊緣虛設電極而電性屏蔽。 The embodiment of the invention provides a capacitive touch panel comprising a substrate, a touch array, a first axial wire and at least one edge dummy electrode. The touch array is disposed on the substrate, and the touch array includes a plurality of first axial electrodes and a plurality of second axial electrodes, and the plurality of first axial electrodes are interlaced with the plurality of second axial electrodes Set and electrically insulated from each other. The respective first axial electrodes may include a plurality of first axial electrode sheets connected to each other, wherein each of the second axial electrodes may include a plurality of second axial electrode sheets connected to each other, and the first axial electrode sheets and the second axial electrode sheets are arranged in a matrix . The first axial wire is disposed on the substrate, and the first axial wire is electrically connected to each of the first axial electrodes and arranged in the same direction as the second axial electrode. The first axial electrode piece directly connected to the first axial wire in the first axial electrode is defined as an edge first axial electrode piece, and the second axial electrode is directly adjacent to the first axial wire and arranged in the same direction The second axial electrode sheet is defined as an edge second axial electrode sheet. The edge dummy electrode has a body portion and a shielding portion connected to the body portion, and the body portion is disposed between the edge first axial electrode sheet and the edge second axial electrode sheet. The shielding portion is disposed between the first axial wire and the edge second axial electrode piece, and is arranged in the same direction as the first axial wire, so that the first axial wire and the edge second axial electrode piece pass through the edge dummy Electrode and electrically shielded.
本發明實施例所提供的電容式觸控面板透邊緣虛設電極之屏蔽部,可使第一軸向導線與第二軸向電極之間透過邊緣虛設電極而達到良好的電性屏蔽效果。另一方面,省去兩軸訊號間地線的設計,不僅可以避免先前地線需跨越絕緣層的高度所造成的斷裂現象,還可以使基板上觸控陣列以外區域的尺寸得以減縮。 The shielding portion of the capacitive touch panel of the capacitive touch panel of the present invention can pass the edge dummy electrode between the first axial conductive line and the second axial electrode to achieve a good electrical shielding effect. On the other hand, the design of the ground line between the two-axis signals can be omitted, and the breakage caused by the height of the previous ground line across the insulating layer can be avoided, and the size of the area outside the touch array on the substrate can be reduced.
為使能更進一步瞭解本發明之特徵及技術內容,請參閱以下有關本發明之詳細說明與附圖,但是此等說明與所附圖式僅係用來說明本發明,而非對本發明的權利範圍作任何的限制。 The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.
1‧‧‧電容式觸控面板 1‧‧‧Capacitive touch panel
11‧‧‧基板 11‧‧‧Substrate
12G‧‧‧通道 12G‧‧‧ channel
12‧‧‧觸控陣列 12‧‧‧Touch array
121‧‧‧第一軸向電極 121‧‧‧First axial electrode
121a‧‧‧第一軸向電極片 121a‧‧‧First axial electrode
121a’‧‧‧邊緣第一軸向電極片 121a'‧‧‧ edge first axial electrode
121b‧‧‧導電橋 121b‧‧‧conductive bridge
121c‧‧‧絕緣層 121c‧‧‧Insulation
121d‧‧‧導電端子 121d‧‧‧conductive terminal
122‧‧‧第二軸向電極 122‧‧‧second axial electrode
122a‧‧‧第二軸向電極片 122a‧‧‧second axial electrode
122a’‧‧‧邊緣第二軸向電極片 122a'‧‧‧Edge second axial electrode
12a‧‧‧主體部 12a‧‧‧ Main body
12b‧‧‧突出部 12b‧‧‧Protruding
122b‧‧‧導線 122b‧‧‧Wire
13‧‧‧第一軸向導線 13‧‧‧First axial conductor
131‧‧‧連接墊 131‧‧‧Connecting mat
14‧‧‧邊緣虛設電極 14‧‧‧Edge dummy electrode
14a‧‧‧本體部 14a‧‧‧ Body Department
14b‧‧‧屏蔽部 14b‧‧‧Shielding Department
15‧‧‧中央虛設電極 15‧‧‧Central dummy electrode
第一軸向(例如X軸) First axis (eg X-axis)
第二軸向(例如Y軸) Second axis (eg Y axis)
W1~W6‧‧‧寬度 W1~W6‧‧‧Width
圖1係本發明一實施例之電容式觸控面板的上視示意圖。 1 is a top plan view of a capacitive touch panel according to an embodiment of the invention.
圖2A係本發明另一實施例之電容式觸控面板的局部上視示意圖。 2A is a partial top plan view of a capacitive touch panel according to another embodiment of the present invention.
圖2B係圖2A之電容式觸控面板沿A1-A1線的剖面示意圖。 2B is a cross-sectional view of the capacitive touch panel of FIG. 2A taken along line A1-A1.
圖2C係圖2A之電容式觸控面板沿A2-A2線的剖面示意圖。 2C is a cross-sectional view of the capacitive touch panel of FIG. 2A taken along line A2-A2.
圖3A係本發明另一實施例之電容式觸控面板的局部上視示意圖。 3A is a partial top plan view of a capacitive touch panel according to another embodiment of the present invention.
圖3B係圖3A之電容式觸控面板沿B1-B1線的剖面示意圖。 3B is a cross-sectional view of the capacitive touch panel of FIG. 3A taken along line B1-B1.
圖3C係圖3A之電容式觸控面板沿B2-B2線的剖面示意圖。 3C is a cross-sectional view of the capacitive touch panel of FIG. 3A taken along line B2-B2.
圖4A係本發明另一實施例之電容式觸控面板的局部上視示意圖。 4A is a partial top plan view of a capacitive touch panel according to another embodiment of the present invention.
圖4B係圖4A之電容式觸控面板沿C1-D1線的剖面示意圖。 4B is a cross-sectional view of the capacitive touch panel of FIG. 4A along the line C1-D1.
圖4C係圖4A之電容式觸控面板沿C2-C2線的剖面示意圖。 4C is a cross-sectional view of the capacitive touch panel of FIG. 4A along the line C2-C2.
為使能更進一步瞭解本發明之特徵及技術內容,請參閱以下有關本發明之詳細說明與附圖,但是此等說明與所附圖式僅是用來說明本發明,而非對本發明的權利範圍作任何的限制。 The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.
請合併參閱圖1、圖2A、圖2B以及圖2C,圖1係本發明一實施例之電容式觸控面板的上視示意圖,圖2A係本發明一實施例之電容式觸控面板的上視示意局部圖,圖2B係圖2A之電容式觸控面板沿A1-A1線的剖面示意圖,而圖2C係圖2A之電容式觸控面板沿A2-A2線的剖面示意圖。電容式觸控面板1包括基板11、觸控陣列12、第一軸向導線13以及複數個邊緣虛設電極14,其中觸控陣列12、第一軸向導線13以及複數個邊緣虛設電極14皆設置於基板11上。 1 is a schematic top view of a capacitive touch panel according to an embodiment of the present invention, and FIG. 2A is a schematic view of a capacitive touch panel according to an embodiment of the invention. 2B is a cross-sectional view of the capacitive touch panel of FIG. 2A along line A1-A1, and FIG. 2C is a cross-sectional view of the capacitive touch panel of FIG. 2A along line A2-A2. The capacitive touch panel 1 includes a substrate 11 , a touch array 12 , a first axial lead 13 , and a plurality of edge dummy electrodes 14 . The touch array 12 , the first axial lead 13 , and the plurality of edge dummy electrodes 14 are all disposed. On the substrate 11.
基板11可為各種透明基板或不透明材質基板,不限於硬質基板或是可撓性基板,例如玻璃基板、聚碳酸酯(Polycarbonate,PC)基板、聚對苯二甲酸乙二酯(Polyethylene terephtalate,PET)基板、聚甲基丙烯酸甲酯(Polymethylmethacrylate,PMMA)基板、聚碸(Polysulfone,PES)基板或者其他環烯共聚物(cyclic olefin copolymer)基板等。基板11的種類是本技術領域具有通常知識者可依據實際需求而定,故本發明之實施例並不限制。 The substrate 11 can be any transparent substrate or opaque substrate, and is not limited to a rigid substrate or a flexible substrate, such as a glass substrate, a polycarbonate (PC) substrate, or a polyethylene terephthalate (PET). a substrate, a polymethylmethacrylate (PMMA) substrate, a polysulfone (PES) substrate, or another cyclic olefin copolymer substrate. The type of the substrate 11 is generally known to those skilled in the art according to actual needs, and thus the embodiment of the present invention is not limited.
請合併參閱圖2A、圖2B以及圖2C。觸控陣列12設置於基板11上。觸控陣列12可包括複數個第一軸向電極121以及複數 個第二軸向電極122,複數個第一軸向電極121與複數個第二軸向電極122係交錯設置,且複數個第一軸向電極121與複數個第二軸向電極122彼此電性絕緣。各第一軸向電極121可包括複數個第一軸向電極片121a,第一軸向電極片121a沿第一軸向(例如X軸)分佈。各第二軸向電極122可包括複數個第二軸向電極片122a,第二軸向電極片122a沿第二軸向(例如Y軸)分佈,且複數個第一軸向電極片121a以及複數個第二軸向電極片122a呈矩陣排列。兩個相鄰的第二軸向電極片122a之間以導線122b連接,而兩個相鄰的第一軸向電極片121a分別置於導線122b的兩側邊,而以橫跨導線122b的導電橋121b而連接彼此,並以絕緣層121c保持導電橋121b與導線122b之間的電性絕緣。 Please refer to FIG. 2A, FIG. 2B and FIG. 2C together. The touch array 12 is disposed on the substrate 11 . The touch array 12 can include a plurality of first axial electrodes 121 and a plurality of The second axial electrodes 122, the plurality of first axial electrodes 121 and the plurality of second axial electrodes 122 are staggered, and the plurality of first axial electrodes 121 and the plurality of second axial electrodes 122 are electrically connected to each other. insulation. Each of the first axial electrodes 121 may include a plurality of first axial electrode sheets 121a distributed along a first axial direction (for example, an X-axis). Each of the second axial electrodes 122 may include a plurality of second axial electrode sheets 122a, and the second axial electrode sheets 122a are distributed along the second axial direction (for example, the Y axis), and the plurality of first axial electrode sheets 121a and the plurality The second axial electrode sheets 122a are arranged in a matrix. Two adjacent second axial electrode sheets 122a are connected by wires 122b, and two adjacent first axial electrode sheets 121a are respectively placed on both sides of the wires 122b to conduct electricity across the wires 122b. The bridges 121b are connected to each other, and the electrical insulation between the conductive bridges 121b and the wires 122b is maintained by the insulating layer 121c.
在本實施例中,第一軸向電極片121a與第二軸向電極片122a可由透明導電材料所形成,所述透明導電材料例如為氧化銦錫(indium tin oxide,ITO)、氧化銦鋅(indium zinc oxide,IZO)、氧化鎘錫(cadmium tin oxide,CTO)、氧化鋁鋅(aluminum zinc oxide,AZO)、氧化銦鋅錫(indium tin zinc oxide,ITZO)、氧化鋅(zinc oxide)、氧化鎘(cadmium oxide)、氧化鉿(hafnium oxide,HfO)、氧化銦鎵鋅(indium gallium zinc oxide,InGaZnO)、氧化銦鎵鋅鎂(indium gallium zinc magnesium oxide,InGaZnMgO)、氧化銦鎵鎂(indium gallium magnesium oxide,InGaMgO)或氧化銦鎵鋁(indium gallium aluminum oxide,InGaAlO),但上述材料並非用以限制本發明。 In this embodiment, the first axial electrode sheet 121a and the second axial electrode sheet 122a may be formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (indium tin oxide). Indium zinc oxide, IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide, oxidation Cadmium oxide, hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium oxide (indium gallium) Magnesium oxide, InGaMgO) or indium gallium aluminum oxide (InGaAlO), but the above materials are not intended to limit the present invention.
第一軸向導線13設置於基板11上。第一軸向電極121中與第一軸向導線13直接相連的第一軸向電極片121a定義為邊緣第一軸向電極片121a’,第二軸向電極122中與第一軸向導線13直接相鄰且同向排列的第二軸向電極片122a定義為邊緣第二軸向電極片122a’。第一軸向導線13電性連接於觸控陣列12的各個第一軸向電極121,以將觸控陣列12與電容式觸控面板1外部的控 制器(圖未繪示)電性連接,電性訊號從而經由第一軸向導線13輸出或輸入各個第一軸向電極121。 The first axial wire 13 is disposed on the substrate 11. The first axial electrode piece 121a of the first axial electrode 121 directly connected to the first axial wire 13 is defined as an edge first axial electrode piece 121a', and the second axial electrode 122 and the first axial wire 13 The second axial electrode sheets 122a directly adjacent and aligned in the same direction are defined as edge second axial electrode sheets 122a'. The first axial wires 13 are electrically connected to the first axial electrodes 121 of the touch array 12 to control the touch array 12 and the external touch panel 1 . The device (not shown) is electrically connected, and the electrical signals are thus output or input to the respective first axial electrodes 121 via the first axial wires 13.
此外,第一軸向導線13包括連接墊131。第一軸向導線13可經由複數個連接墊131電性連接於各個第一軸向電極121。其中第一軸向導線13的連接墊131是疊設於第一軸向電極121且與第一軸向電極121電性連接。第一軸向導線13的材料例如為鋁、銀、銅等金屬或者碳膠,第一第一軸向導線13可以透過電鍍或印刷等方法形成,但本發明並不僅以此為限。 Further, the first axial wire 13 includes a connection pad 131. The first axial wire 13 can be electrically connected to each of the first axial electrodes 121 via a plurality of connection pads 131. The connection pad 131 of the first axial wire 13 is stacked on the first axial electrode 121 and electrically connected to the first axial electrode 121. The material of the first axial wire 13 is, for example, a metal such as aluminum, silver or copper or a carbon glue. The first first axial wire 13 can be formed by electroplating or printing, but the invention is not limited thereto.
複數個邊緣虛設電極14設置於基板11上。各邊緣虛設電極14具有本體部14a以及與本體部14a連接的屏蔽部14b,其中邊緣虛設電極14的本體部14a設置於邊緣第一軸向電極片121a’與邊緣第二軸向電極片122a’之間,用以電性隔絕邊緣第一軸向電極片121a’與邊緣第二軸向電極片122a’。邊緣虛設電極14的屏蔽部14b設置於第一軸向導線13與邊緣第二軸向電極片122a’之間,並與第一軸向導線13同向排列,用以電性隔絕邊緣第二軸向電極片122a’與第一軸向導線13,使第一軸向導線13與邊緣第二軸向電極片122a’之間透過複數個邊緣虛設電極14而電性屏蔽。藉此,邊緣虛設電極14可有效屏蔽第一軸向導線13與第二軸向電極122之間的信號串擾,以降低信號串擾對於整體電容式觸控面板1的影響。 A plurality of edge dummy electrodes 14 are disposed on the substrate 11. Each of the edge dummy electrodes 14 has a body portion 14a and a shield portion 14b connected to the body portion 14a, wherein the body portion 14a of the edge dummy electrode 14 is disposed at the edge first axial electrode sheet 121a' and the edge second axial electrode sheet 122a' Between the edges, the first axial electrode sheet 121a' and the second axial electrode sheet 122a' are electrically insulated. The shielding portion 14b of the edge dummy electrode 14 is disposed between the first axial wire 13 and the edge second axial electrode piece 122a', and is arranged in the same direction as the first axial wire 13 for electrically isolating the edge second axis. The electrode sheet 122a' and the first axial wire 13 are electrically shielded between the first axial wire 13 and the edge second axial electrode piece 122a' through the plurality of edge dummy electrodes 14. Thereby, the edge dummy electrode 14 can effectively shield the signal crosstalk between the first axial wire 13 and the second axial electrode 122 to reduce the influence of signal crosstalk on the overall capacitive touch panel 1.
如圖2A所示,在本實施例中,邊緣虛設電極14的本體部14a為沿第一軸向延伸的條狀,邊緣虛設電極14的屏蔽部14b為沿第二軸向延伸的條狀。邊緣虛設電極14的屏蔽部14b還可沿著邊緣第二軸向電極片122a’的邊緣沿伸而與相鄰的屏蔽部14b相連接,而每個屏蔽部14b的其中一端與一個本體部14a連接,以包圍第二軸向電極片122a’之與第一軸向導線13相鄰的一側。在其他實施例中,本體部14a、屏蔽部14b也可以為多邊形,也可以為不連續的多邊形組合。在各個邊緣虛設電極14中,屏蔽部14b在 第二軸向上的寬度W2大於本體部14a在第二軸向上的寬度W3,此外,屏蔽部14b在第一軸向上的寬度W1例如為0.1毫米至2毫米。邊緣虛設電極14與相鄰的邊緣第一軸向電極片121a’之間的距離例如小於或等於40微米,邊緣虛設電極14與相鄰的邊緣第二軸向電極片122a’之間的距離例如小於或等於40微米。 As shown in FIG. 2A, in the present embodiment, the body portion 14a of the edge dummy electrode 14 has a strip shape extending in the first axial direction, and the shield portion 14b of the edge dummy electrode 14 has a strip shape extending in the second axial direction. The shield portion 14b of the edge dummy electrode 14 may also extend along the edge of the edge second axial electrode sheet 122a' to be adjacent to the adjacent shield portion 14b, and one end of each shield portion 14b and a body portion 14a Connected to surround a side of the second axial electrode piece 122a' adjacent to the first axial wire 13. In other embodiments, the body portion 14a and the shielding portion 14b may be polygonal or non-continuous polygonal combinations. In each of the edge dummy electrodes 14, the shield portion 14b is The width W2 in the second axial direction is greater than the width W3 of the body portion 14a in the second axial direction, and further, the width W1 of the shield portion 14b in the first axial direction is, for example, 0.1 mm to 2 mm. The distance between the edge dummy electrode 14 and the adjacent edge first axial electrode sheet 121a' is, for example, less than or equal to 40 micrometers, and the distance between the edge dummy electrode 14 and the adjacent edge second axial electrode sheet 122a' is, for example, Less than or equal to 40 microns.
由此,邊緣虛設電極14的屏蔽部14b可沿第二軸向延伸並保持與觸控陣列12(包括第一軸向電極121以及第二軸向電極122)之間電性絕緣,且邊緣虛設電極14的屏蔽部14b保持與第一軸向導線13之間電性絕緣。詳細而言,邊緣虛設電極14沿著邊緣第一軸向電極片121a’以及邊緣第二軸向電極片122a’的邊緣設置而不需跨越各邊緣第一軸向電極片121a’、邊緣第二軸向電極片122a’或者第一軸向導線13,因此邊緣虛設電極14的配置不影響第一軸向導線13與觸控陣列12之電性連接,且邊緣虛設電極14的配置不受其餘導電線路(圖未繪示)配置的限制。同時,省去地線的設計,也可以避免先前地線需跨越絕緣層的高度所造成的斷裂現象。 Therefore, the shielding portion 14b of the edge dummy electrode 14 can extend along the second axial direction and be electrically insulated from the touch array 12 (including the first axial electrode 121 and the second axial electrode 122), and the edge is dummy. The shield portion 14b of the electrode 14 is kept electrically insulated from the first axial wire 13. In detail, the edge dummy electrode 14 is disposed along the edge of the edge first axial electrode piece 121a' and the edge second axial electrode piece 122a' without crossing the edge first axial electrode piece 121a', the edge second The axial electrode piece 122a' or the first axial wire 13, so the configuration of the edge dummy electrode 14 does not affect the electrical connection of the first axial wire 13 and the touch array 12, and the configuration of the edge dummy electrode 14 is not affected by the remaining conductive The limit of the line (not shown) configuration. At the same time, the design of the ground wire can be omitted, and the phenomenon that the previous ground wire needs to cross the height of the insulating layer can be avoided.
在基板11上,相鄰的第一軸向電極121以及第二軸向電極122之間還存有通道12G,以暴露基板11的表面。換言之,第一軸向電極121以及第二軸向電極122可透過通道12G彼此電性絕緣。進一步的,電容式觸控面板1還可包括複數個中央虛設電極15,中央虛設電極15設置於基板11上且位於基板11的中央。中央虛設電極15沿著第一軸向電極片121a的邊緣以及第二軸向電極片122a的邊緣而填補於通道12G中間。中央虛設電極15與第一軸向電極121彼此電性絕緣,且中央虛設電極15與第二軸向電極122也彼此電性絕緣。中央虛設電極15使得第一軸向電極121與第二軸向電極122彼此相互絕緣,有效屏蔽兩者之間的信號串擾。另一方面,中央虛設電極15還用以在視覺上降低每一第一軸 向電極片121a、第二軸向電極片122a與通道12G之間之光穿透與光反射之對比,以減少觸控陣列12的光學可視性。 On the substrate 11, a channel 12G is also present between the adjacent first axial electrode 121 and the second axial electrode 122 to expose the surface of the substrate 11. In other words, the first axial electrode 121 and the second axial electrode 122 are electrically insulated from each other through the channel 12G. Further, the capacitive touch panel 1 may further include a plurality of central dummy electrodes 15 disposed on the substrate 11 and located at the center of the substrate 11. The central dummy electrode 15 is filled in the middle of the channel 12G along the edge of the first axial electrode sheet 121a and the edge of the second axial electrode sheet 122a. The central dummy electrode 15 and the first axial electrode 121 are electrically insulated from each other, and the central dummy electrode 15 and the second axial electrode 122 are also electrically insulated from each other. The central dummy electrode 15 insulates the first axial electrode 121 and the second axial electrode 122 from each other, effectively shielding signal crosstalk between the two. On the other hand, the central dummy electrode 15 is also used to visually reduce each of the first axes The light penetration between the electrode sheet 121a, the second axial electrode sheet 122a and the channel 12G is compared with the light reflection to reduce the optical visibility of the touch array 12.
在本實施例中,中央虛設電極15為長條形狀,在其他實施例中,可為多邊形或其他多邊形組合。在設計上,中央虛設電極15與相鄰第一軸向電極片121a之間的距離例如小於或等於40微米,中央虛設電極15與相鄰第二軸向電極片122a之間的距離例如小於或等於40微米。 In the present embodiment, the central dummy electrode 15 is in the shape of a strip, and in other embodiments, it may be a polygon or other combination of polygons. In design, the distance between the central dummy electrode 15 and the adjacent first axial electrode sheet 121a is, for example, less than or equal to 40 micrometers, and the distance between the central dummy electrode 15 and the adjacent second axial electrode sheet 122a is, for example, less than or Equal to 40 microns.
值得注意的是,第一軸向電極片121a、第二軸向電極片122a、邊緣虛設電極14以及中央虛設電極15可由同一製程完成。在本實施例中,第一軸向電極片121a(包括邊緣第一軸向電極片121a’)、第二軸向電極片122a(包括邊緣第二軸向電極片122a’)、邊緣虛設電極14以及中央虛設電極15可皆由透明導電材料所形成,所述透明導電材料例如為氧化銦錫(indium tin oxide,ITO)、氧化銦鋅(indium zinc oxide,IZO)、氧化鎘錫(cadmium tin oxide,CTO)、氧化鋁鋅(aluminum zinc oxide,AZO)、氧化銦鋅錫(indium tin zinc oxide,ITZO)、氧化鋅(zinc oxide)、氧化鎘(cadmium oxide)、氧化鉿(hafnium oxide,HfO)、氧化銦鎵鋅(indium gallium zinc oxide,InGaZnO)、氧化銦鎵鋅鎂(indium gallium zinc magnesium oxide,InGaZnMgO)、氧化銦鎵鎂(indium gallium magnesium oxide,InGaMgO)或氧化銦鎵鋁(indium gallium aluminum oxide,InGaAlO),但上述材料並非用以限制本發明。 It should be noted that the first axial electrode sheet 121a, the second axial electrode sheet 122a, the edge dummy electrode 14, and the central dummy electrode 15 can be completed by the same process. In the present embodiment, the first axial electrode sheet 121a (including the edge first axial electrode sheet 121a'), the second axial electrode sheet 122a (including the edge second axial electrode sheet 122a'), and the edge dummy electrode 14 And the central dummy electrode 15 can be formed by a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or cadmium tin oxide. , CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide, cadmium oxide, hafnium oxide (HfO) Indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum (indium gallium aluminum) Oxide, InGaAlO), but the above materials are not intended to limit the invention.
以上各元件之相對位置亦可視需要作多種變型,以下將說明本發明電容式觸控面板1之其它實施例。需先敘明,以下各實施例各元件未作說明的其它特性可與前述實施例相同,後續不再贅述。 The relative positions of the above components can also be variously modified as needed. Other embodiments of the capacitive touch panel 1 of the present invention will be described below. It should be noted that other features not described in the following embodiments may be the same as those in the foregoing embodiments, and will not be described again.
〔電容式觸控面板之另一實施例〕 [Another embodiment of a capacitive touch panel]
請一併參考圖3A、圖3B以及圖3C,圖3A係本發明另一實施例之電容式觸控面板的局部上視示意圖,圖3B係圖3A之電容 式觸控面板沿B1-B1線的剖面示意圖,而圖3C係圖3A之電容式觸控面板沿B2-B2線的剖面示意圖。本實施例的大致結構及連接關係與圖2A所示的實施例相同,不同之處在於,於本實施例中,邊緣第二軸向電極片122a’還包括相互連接的主體部12a和突出部12b,且突出部12b設置在主體部12a之與第一軸向導線13相鄰的一側,突出部12b在第二軸向的寬度小於主體部12a在第二軸向的寬度。 Please refer to FIG. 3A, FIG. 3B and FIG. 3C together. FIG. 3A is a partial top view of a capacitive touch panel according to another embodiment of the present invention, and FIG. 3B is a capacitor of FIG. FIG. 3C is a schematic cross-sectional view of the capacitive touch panel of FIG. 3A along line B2-B2. The general structure and the connection relationship of the present embodiment are the same as those of the embodiment shown in FIG. 2A, except that in the embodiment, the edge second axial electrode sheet 122a' further includes a main body portion 12a and a protruding portion that are connected to each other. 12b, and the protruding portion 12b is provided on a side of the main body portion 12a adjacent to the first axial wire 13, and the width of the protruding portion 12b in the second axial direction is smaller than the width of the main body portion 12a in the second axial direction.
如圖3A所示,在本實施例中,邊緣第二軸向電極片122a’的突出部12b的形狀為三角形。其中一尖角朝向第一軸向導線13。於其他未繪示的實施例中,邊緣第二軸向電極片122a’的突出部12b可為多邊形、圓形等,且邊緣第二軸向電極片122a’的突出部12b的形狀可各不相同。 As shown in Fig. 3A, in the present embodiment, the shape of the projection 12b of the edge second axial electrode piece 122a' is a triangle. One of the sharp corners faces the first axial wire 13. In other embodiments not shown, the protruding portion 12b of the edge second axial electrode sheet 122a' may be polygonal, circular, or the like, and the shape of the protruding portion 12b of the edge second axial electrode sheet 122a' may be different. the same.
邊緣虛設電極14的屏蔽部14b沿著邊緣第二軸向電極片122a’之突出部12b的邊緣延伸,并包圍突出部12b。在本實施例中,邊緣虛設電極14的屏蔽部14b呈兩個相互對稱的三角形,在其他實施例中,可為半圓形、月牙形、多邊形等,並且W2的寬度大於W3的寬度。邊緣虛設電極14的屏蔽部14b沿著第二軸向延伸而用以電性隔絕邊緣第二軸向電極片122a’與第一軸向導線13。藉此,邊緣虛設電極14可有效屏蔽第一軸向導線13與第二軸向電極122之間的信號串擾,並且由於屏蔽部14b面積的擴大,電性屏蔽效果相對實施例2A而言也更佳。圖3A至圖3C中的其餘製程細節如前實施例2A所述,本技術領域具有通常知識者應可輕易推知其實施方式,在此不加贅述。 The shield portion 14b of the faint dummy electrode 14 extends along the edge of the projection 12b of the edge second axial electrode piece 122a' and surrounds the projection 12b. In the present embodiment, the shield portion 14b of the edge dummy electrode 14 has two mutually symmetrical triangles. In other embodiments, it may be semicircular, crescent, polygonal, etc., and the width of W2 is greater than the width of W3. The shield portion 14b of the edge dummy electrode 14 extends along the second axial direction to electrically isolate the edge second axial electrode sheet 122a' from the first axial wire 13. Thereby, the edge dummy electrode 14 can effectively shield the signal crosstalk between the first axial wire 13 and the second axial electrode 122, and the electrical shielding effect is also more than that of the embodiment 2A due to the enlargement of the area of the shielding portion 14b. good. The remaining process details in FIG. 3A to FIG. 3C are as described in the previous embodiment 2A, and those skilled in the art can easily infer the implementation manner thereof, and no further details are provided herein.
〔電容式觸控面板之另一實施例〕 [Another embodiment of a capacitive touch panel]
請一併參考圖4A、圖4B以及圖4C,圖4A係本發明另一實施例之電容式觸控面板的局部上視示意圖,圖4B係圖4A之電容式觸控面板沿C1-C1線的剖面示意圖,而圖4C係圖4A之電容式觸控面板沿C2-C2線的剖面示意圖。 Referring to FIG. 4A, FIG. 4B and FIG. 4C, FIG. 4A is a partial top view of a capacitive touch panel according to another embodiment of the present invention, and FIG. 4B is a line of the capacitive touch panel of FIG. 4A along the C1-C1 line. FIG. 4C is a cross-sectional view of the capacitive touch panel of FIG. 4A along the line C2-C2.
本實施例的大致結構及連接關係與圖2A所示的實施例相同,不同之處在於,於本實施例中,各個邊緣第一軸向電極片121a’還具有導電端子121d,而第一軸向導線13可分別經由導電端子121d電性連接至邊緣第一軸向電極片121a’。導電端子121d沿著第二軸向延伸并設置於邊緣虛設電極14的屏蔽部14b與第一軸向導線13之間,使第一軸向導線13與邊緣第二軸向電極片122a’之間透過導電端子121d而電性屏蔽。藉此,邊緣第一軸向電極片121a’的導電端子121d也可屏蔽第一軸向導線13與邊緣第二軸向電極片122a’之間的信號串擾,使得電性屏蔽效果大大提高。 The general structure and the connection relationship of the present embodiment are the same as those of the embodiment shown in FIG. 2A, except that in the embodiment, each edge first axial electrode sheet 121a' further has a conductive terminal 121d, and the first axis The lead wires 13 may be electrically connected to the edge first axial electrode sheets 121a' via the conductive terminals 121d, respectively. The conductive terminal 121d extends along the second axial direction and is disposed between the shield portion 14b of the edge dummy electrode 14 and the first axial wire 13, such that the first axial wire 13 and the edge second axial electrode piece 122a' It is electrically shielded through the conductive terminal 121d. Thereby, the conductive terminal 121d of the edge first axial electrode sheet 121a' can also shield the signal crosstalk between the first axial wire 13 and the edge second axial electrode piece 122a', so that the electrical shielding effect is greatly improved.
如圖4A所示,在本實施例中,邊緣第一軸向電極片121a’的導電端子121d的形狀為沿第二軸向延伸的長條矩形,而第一軸向導線13的連接墊131是疊設於導電端子121d以與邊緣第一軸向電極片121a’電性連接。於其他未繪示的實施例中,邊緣第一軸向電極片121a’的導電端子121d可為多邊形或其他多邊形組合。此外,導電端子121d在第二軸向上的寬度W5大於各個邊緣第一軸向電極片121a’在第二軸向上的寬度W6,各個導電端子121d在第一軸向上的寬度W4例如為0.1毫米至2.5毫米。 As shown in FIG. 4A, in the present embodiment, the shape of the conductive terminal 121d of the edge first axial electrode sheet 121a' is an elongated rectangle extending along the second axial direction, and the connection pad 131 of the first axial conductive line 13 It is stacked on the conductive terminal 121d to be electrically connected to the edge first axial electrode piece 121a'. In other embodiments not shown, the conductive terminals 121d of the edge first axial electrode sheets 121a' may be polygonal or other polygonal combinations. In addition, the width W5 of the conductive terminal 121d in the second axial direction is greater than the width W6 of the first edge first axial electrode sheet 121a' in the second axial direction, and the width W4 of each of the conductive terminals 121d in the first axial direction is, for example, 0.1 mm to 2.5 mm.
值得注意的是,邊緣第一軸向電極片121a’的導電端子121d與邊緣虛設電極14的屏蔽部14b之間相互隔開,因而邊緣第一軸向電極片121a’的導電端子121d與邊緣虛設電極14的屏蔽部14b保持電性絕緣。圖4A至圖4C中的其餘製程細節如前實施例2A所述,本技術領域具有通常知識者應可輕易推知其實施方式,在此不加贅述。 It should be noted that the conductive terminal 121d of the edge first axial electrode sheet 121a' and the shield portion 14b of the edge dummy electrode 14 are spaced apart from each other, and thus the conductive terminal 121d and the edge of the edge first axial electrode sheet 121a' are dummy. The shield portion 14b of the electrode 14 remains electrically insulated. The remaining process details in FIG. 4A to FIG. 4C are as described in the foregoing embodiment 2A, and those skilled in the art should be able to easily infer the implementation manner thereof, and no further details are provided herein.
綜上所述,本發明實施例所提供的電容式觸控面板1透過邊緣虛設電極14之屏蔽部14b設置於第一軸向導線13與邊緣第二軸向電極片122a’之間,並與第一軸向導線13同向排列,可使第一軸向導線13與邊緣第二軸向電極片122a’之間透過邊緣虛設電 極14而電性屏蔽。此外,所述電容式觸控面板1還可透過邊緣第二軸向電極片122a’的設計而改變邊緣虛設電極14的形狀,邊緣虛設電極14從而對應於邊緣第二軸向電極片122a’的邊緣形狀而設置於第一軸向導線13與邊緣第二軸向電極片122a’之間。藉此,所述電容式觸控面板1透過邊緣虛設電極14之屏蔽部14b,可使第一軸向導線13與邊緣第二軸向電極片122a’之間透過邊緣虛設電極14而達到良好的電性屏蔽效果。另一方面,省去兩軸訊號間地線的設計,不僅可以避免先前地線需跨越絕緣層的高度所造成的斷裂現象,還可以使基板上觸控陣列以外區域的尺寸得以減縮。於本發明一實施例中,第一軸向電極片121a、第二軸向電極片122a、邊緣虛設電極14以及中央虛設電極15可由同一製程完成,因此可減少工時及成本,且降低因多道製程所產生的失誤,並可大幅提高製程良率。 In summary, the capacitive touch panel 1 provided in the embodiment of the present invention is disposed between the first axial conductive line 13 and the edge second axial electrode sheet 122a' through the shielding portion 14b of the edge dummy electrode 14 and is The first axial wires 13 are arranged in the same direction, so that the first axial wires 13 and the edge second axial electrode plates 122a' can be electrically connected to each other through the edges. The pole 14 is electrically shielded. In addition, the capacitive touch panel 1 can also change the shape of the edge dummy electrode 14 through the design of the edge second axial electrode sheet 122a', and the edge dummy electrode 14 thus corresponds to the edge second axial electrode sheet 122a'. The edge shape is disposed between the first axial wire 13 and the edge second axial electrode piece 122a'. Therefore, the capacitive touch panel 1 can pass through the shield portion 14b of the edge dummy electrode 14 to achieve good communication between the first axial conductive line 13 and the edge second axial electrode sheet 122a' through the edge dummy electrode 14. Electrical shielding effect. On the other hand, the design of the ground line between the two-axis signals can be omitted, and the breakage caused by the height of the previous ground line across the insulating layer can be avoided, and the size of the area outside the touch array on the substrate can be reduced. In an embodiment of the invention, the first axial electrode sheet 121a, the second axial electrode sheet 122a, the edge dummy electrode 14 and the central dummy electrode 15 can be completed by the same process, thereby reducing man-hours and costs, and reducing the number of The mistakes made by the process can greatly improve the process yield.
以上所述僅為本發明的實施例,其並非用以限定本發明的專利保護範圍。任何熟習相像技藝者,在不脫離本發明的精神與範圍內,所作的更動及潤飾的等效替換,仍為本發明的專利保護範圍內。 The above is only an embodiment of the present invention, and is not intended to limit the scope of the invention. It is still within the scope of patent protection of the present invention to make any substitutions and modifications of the modifications made by those skilled in the art without departing from the spirit and scope of the invention.
1‧‧‧電容式觸控面板 1‧‧‧Capacitive touch panel
11‧‧‧基板 11‧‧‧Substrate
12‧‧‧觸控陣列 12‧‧‧Touch array
121‧‧‧第一軸向電極 121‧‧‧First axial electrode
121a‧‧‧第一軸向電極片 121a‧‧‧First axial electrode
121a’‧‧‧邊緣第一軸向電極片 121a'‧‧‧ edge first axial electrode
122‧‧‧第二軸向電極 122‧‧‧second axial electrode
122a‧‧‧第二軸向電極片 122a‧‧‧second axial electrode
122a’‧‧‧邊緣第二軸向電極片 122a'‧‧‧Edge second axial electrode
13‧‧‧第一軸向導線 13‧‧‧First axial conductor
14‧‧‧邊緣虛設電極 14‧‧‧Edge dummy electrode
15‧‧‧中央虛設電極 15‧‧‧Central dummy electrode
第一軸向(例如X軸) First axis (eg X-axis)
第二軸向(例如Y軸) Second axis (eg Y axis)
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